Below you see graphs that depict the change in frequency of a neutral allele in four populations that differ in size. Which population would you predict is the smallest? 
Definitions:
Endodermal Cells
Cells that make up the endoderm, the innermost layer of cells in early animal embryos, which eventually forms the lining of the digestive and respiratory systems.
Aquaporins
Protein channels in cell membranes that facilitate the transport of water and, in some cases, small solutes across the membrane.
Active Transport
The movement of molecules across a cell membrane from a region of lower concentration to a region of higher concentration, requiring energy input usually in the form of ATP.
Primary Eudicot
A group within the angiosperms characterized by seeds with three protective coverings.
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